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By Carrie Angus, M.D.
'It's 3 a.m. You're scheduled to give a big presentation at eleven, only eight hours away. You desperately need to sleep so you will be rested and alert when your big moment comes, but here you are staring wide eyed at the bedroom ceiling. Your mind is agitated and your body won't relax. The harder you work at getting to sleep, the wider awake you are. You've already tried counting sheep, watching the late show, and making yourself a snack-all to no avail. In desperation you reach for a sleeping pill.
This is a common scenario in the United States, where approximately one third of all adults suffer from some type of sleep disorder. Insomnia, the most common type by far, is clinically defined as the inability to fall asleep after lying in bed for thirty minutes or the inability to sustain sleep for more than a few hours without waking. Practically speaking, however, insomnia can be defined as unrestful sleep.'
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